能楽〜室町の仮面劇

Ars antiqua is a medieval European musical style that flourished roughly from the late 12th century to the early 14th century, with its center of gravity in Paris and the Notre Dame Cathedral school. It is defined by the consolidation of measured rhythm through the six rhythmic modes, the cultivation of polyphony in organum and discant styles, and the emergence of the early motet and conductus. Composers favored two to four vocal parts, with a chant-derived tenor forming the foundation and upper voices providing melismatic and texted counterpoint. Harmony emphasized perfect consonances (unisons, fourths, fifths, and octaves), with cadences carefully prepared. Ars antiqua laid crucial groundwork for European notation (including Franconian mensural concepts), enabling more precise rhythmic coordination and setting the stage for the innovations of the later Ars nova.

Convent is a sacred vocal tradition centered on music sung by communities of nuns in Roman Catholic (and, at times, Eastern Christian) convents. The core repertoire comprises Gregorian chant and office hymns in Latin, sung in unison without instrumental accompaniment and shaped by the liturgical calendar. While fundamentally monophonic and modal, the sound world ranges from syllabic psalm tones to highly melismatic antiphons and responsories. From the Renaissance onward, some convents cultivated simple polyphony and, in Baroque Italy, even sophisticated multi-voice music written by cloistered women composers. Modern recordings typically feature a cappella female choirs in resonant chapels, emphasizing clarity of text, steady breath, and a contemplative, prayerful delivery.

Plainchant (cantus planus) is the monophonic, unaccompanied chant of the Western Christian liturgy. Sung in Latin (with occasional Greek), it uses modal scales rather than major–minor tonality and unfolds in flexible, speech-like rhythms shaped by the sacred text. Melodically, plainchant ranges from simple syllabic formulas for reciting psalms to ornate melismatic lines for processional and festal moments. It is performed in unison by a schola or congregation, often organized antiphonally or responsorially across the liturgical actions of the Mass and the Divine Office. Its austere sonority, modal color, and text-centered phrasing give it a contemplative, timeless quality.